480 v 3 phase

Question

Apr 10, 2006, 08:13 AM

RigPkg1

New Member

Join Date: Apr 2006

Posts: 1

480 v 3 phase

I'm a fairly new plant technician.. but our company just purchased a rotary die cutter that requires 480v 3 phase at 30 amps our plant only has 220V 3 phase.. What kind of transformer do we need to step up the voltage like that.. I believe that we will be drawing 60 amps from 220 correct?

Answers

Apr 10, 2006, 12:32 PM	#2

tkrussell

Senior Electrical & Lighting Expert

Join Date: Jan 2005

Posts: 5,810

Are you sure the actual voltage is 220 ? Are you sure it is not 208 Volt?

In any case a standard dry type transformer, of the KVA that will serve 30 amps, connected reverse will work.

Do you know how to calculate KVA?
What is the actual nameplate amps of the unit?
If a motor what is the HP?
What is the LRA of the motor?

Double check the actual voltage and answer the questions above and we can go from there

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